Method of manufacturing composition roofing



July 5, 1932 c. R. MacDoNALD METHOD OF MANUFACTURING COMPOSITION ROOFINGv 2 Sheets-Sheet 1 July 5 1932 c. R. MacDoNALD METHOD OF MANUFACTURINGCOMPOSITION ROOFING Filed Aug. 9. 1.928

2 Sheets-Sheet 2 NTULWDU III gwwmtofo eJier/llacanald Sw MW @wwwPatented July 5, 1932 UNITED STATES PATENT OFFICE CHESTER R. MACDONALD,F MONROE, MICHIGAN, ASSIGNOB, BY MESN E ASSIGNMENTS, TO THE PATENT ANDLICENSING CORPORATION, OF BOSTON, MASSACHUSETTS, A

CORPORATION OF MASSACHUSETTS METHOD 0E MANUFACTURING COMPOSITION ROOFINGl Application. filed August 9, 1928. lSerial No. 298,515.

brous material is first saturated with a low melting point asphalt orlike material; coated with suitable material; slated, notched orvslotted to dene tabs and then, a continuous manner, recoating themargmal portions of the strip while the strip is advancing in ahorizontal plane, reslating such marginal portions, applying the same topressure rolls or the like and nally longitudinally dividing the web toprovide shingle strips of desirable character, Y

It is ordinarily the practice of roofing manufacturers to saturate,coat, and slate a web of material and to thereafter slot the same. It isadvisable to recoat and reslate at least portions of the web containingthe slots `to the end that the complete shingle Will be sightly in apearance and the notched portions thereo will be coated and slated toprevent deterioration thereof. My invention, therefore, contemplatesthese steps of resurfacing and recoating as a continuous process, whileadvancing the slotted web and maintaining it in a horizontal plane andVapplying to the marginal portions thereof an asphalt coating of suitableviscosity which gradually gravitates downwardly around the notchedportions and marginal edges; thence slating such marginal portions ofthe .advancing web, applying pressure thereto and finally longitudinallyand transversely dividing the web to dene shingle strips of desiredconfigurations.`

. There are other subordinate objects of the invention which will be-apparent to those skilled in theart from the reading of thefollowingspeciications in conjunction with the drawin s attahedheretoand forming a part hereo in which- Figure 1 represents in a schematicmanner the preferred sequence of steps designated as A, B, C, D, E, andF'; j

Figure 2 represents in alike diagrammatic manner a sequence of stepspreceding step C and designated A1, A2, A5, A, A, and A", k illustratingthe idea of rst slotting theA roof lboth the upper ing felt andthereafter saturating, coating, slating and compressing it before itsmarginal portions are recoated and resurfaced, etc., as designated bysteps C and D of F igure 1.

Figure 3 is a view of a pressure belt arrangement that may-be used inlieu of or in conjunction with step E as shown in Figure 1.

In the manufacture of composition roofings, as aforesaid, it is theusual practice to first saturate and coat the web of felt beforetransversely slotting the same to form tabs. It, therefore, becomesnecessary to recoat the slotted portions of the web and exposed edgesand to reslate the same to the end that a durable shingle may beobtained and one which presents a pleasing appearance. In someinstances, this recoating and resurfacing has been accomplished by handdipping of individual strips by an operator taking one side portionofthe strip and vertically submerging it into the coating medium andslating the same. This procedureobviously -runs into a considerable itemof expense.

Such a vertical submersion of the strip furthermore applies the asphaltand coating to and lower surfaces ofthe shingle.

It will apparent from the diagrammatic illustration contained in Figurel that my invention is based upon the discovery thatv such a recoatingand resurfacing procedure may be carried out in a continuous mannerwithout the necessity of hand manipulation and also without requiringthat the web be vertically submerged in the slating mediums.

Referring particularly to Figure 1 of the drawings, l represents a webof felt or like resurfacing and reroong material which haspreviouslybeen saturated with a low melting point asphalt or the likeand has been coated in the manner known in the art by a suitableweatherproof coating and also surfaced with slate orsimilar comminutedmineral. This saturated, coated and slated web is thereafter slotted asshown at 2 to form tabs 3 in a manner Well nown inthe art. vvThe webthus slotted is thence continuously advanced to the point Vout howeverrunning inwardly to the central zone of the strip, which zone is notdesired to be recoated. Thus the asphalt is maintained in a ratherviscous or heavy state so that it will not have a decided tendency tomigrate inwardly towards the central portion of the web, but inasmuch asit is applied at the marginal edges it will naturally gravitatedownwardly to coat the edges of the cut-outs. This recoating step occurswhile Vthe web is maintained in a horizontal plane and consequently theviscous asphalt gravitates downwardly so that it completely coversthe'edges of slots and margins of the web. If desired, a thin coating ofasphalt may be applied to theunder surface of the web but this is notessential. The thus recoated 'web is thereafter advanced, in acontinuous manner, while maintaining it in a horizontal plane,'to thepoint designated by H `step D in Figure 1 of thedrawings where it isresurfacedwith slate, mica, or other suit- .able materials orcombinations of materials.

This coating of slate is likewise applied only to the longitudinalmarginal portions of the web, wthout slating the central portion thereofas shown by reference numeral 6. Reference numeral 7 designates thereslated longitudinal portions of the web. The web is thereaftercontinuously advanced to, any.

suitable kind of pressure rolls as shown, for

example, schematically in step E of FigureV4 1 wherein the recoated andresurfaced web is led between the rolls 8. As stated, the pressure beltarrangementshown ink modification E', Figure', may be employed in lieuof or in conjunction with the bed pressure rolls shown in step E ofFigure 1. This modification consists of an endless top pressure belt 8and an endless bottom pressure belt 8" between which the roofing web isfed.

After the web hasbeen resurfaced, reslated and subjected to the pressureof rollers or belts, as aforesaid, the same is longitudinally divided,preferably during the course of its travel, slitting the same as at 9,and transversel dividing the same so that strips of suitab e lengths anddimensions maybe obtained.

It is also within the contemplation of this invention to slightly changethe' sequence of steps in accordance with the diagrammatic showing ofFigure 2 wherein the'l felt A1, before saturation, is first slotted asIat A2 and thereafter saturated with a low melting point -f asphalt inany desirable manner as at A3;

coated at A4, slated at A5,v conveyed over` a festooning mechanism A,after which the slotted web, thusv coated and slated, is advanced whilemaintaining it in a horizontal plane to a position where asphalt issprayed or otherwise applied on its marginal portions thereof'as in stepC of Figure 1; the vmarginal portions thereof thereafterl slated as instep D of 'Figure 1; then subjecting the same to pressure rolls orpressure belts as in E of Figure 1 and finally slitting thesamelongitudinally as inF of Figure 1.

It will be apparent from the foregoing that my invention contemplates acontinuous process of treating a roofing web in order to resurface andreslate the exposed marginal portions thereof at a minimum of expenseand without the'necessity of any hand manipulation or unnecessarywastage of materials. I realize however, that the particular steps orforms of apparatus herein disclosed and described are not entirelynecessary to carry out my invention and that numerous changes in suchprocedure may be made without departing from the spirit of the inventionas within the reasonable scope of the following claims:

Having thus described the invention, what I claim is:

1. A process of manufacturing composition shingles, the steps whichcomprise the saturation and slating of a web and thereafter the slottingthereof to define tabs and in continuously advancing the thus saturatedand slotted web to a position for receiving a recoating of asphalt orlike material thereon onthe opposite upper marginal faces only thereofand in' subsequently reslating at least the exposed tabs thereof anddividing the web into shingle strips of desired configuration andlengths.

2.v A process of manufacturing composition shingles, which comprises thesaturation and slotting of a web felt, coating the upper oppositemarginal faces only of the web, including the notched portions and theedges of the web to Iseal the same, applying slate to such portions,and` in finally dividing the same to provide shingle strips.

3. A continuous process of manufacturing composition shingles, whichcomprises the following steps; advancing a slotted web in a horizontalposition, applying a viscous coating of asphalt to the opposite marginalfaces thereof including the edgeskand on the upper surface thereof,reslating such marginal portions of the web only and in thereafterVdividing the web into s trip shingles.

4. A continuous process of manufacturing shingles consisting in feedinga slotted, satmaintaining it in a horizontal position, to a positionwhere recoating of the longitudinal opposite marginal zones only thereofoccurs, in thereafter slating such marginal zones only of the web andthereafter subdividing vurated, coated and slated felted web, while 125.

the web to obtain shingle strips of desired sizes.

5. A continuous process of manufacturing `shingles consisting in feedinga slotted and Y 5, coated felted web, While maintaining it in ahorizontal plane, to a position wherein its upper, opposite marginalportions only are coated by spraying asphalt thereto, in-con` tinuouslyadvancing the web' and slatin such marginal portions only thereof and inally sub-dividing the web to obtain shingle strips of desired sizes. y

6. The steps in the process of manufacturing shingles consisting infeeding a slotted shingle web .in a horizontal plane, applying asphalticmaterial to the opposite marginal zones only of said web, but not to theintermediate or central zone thereof and inthereafter slitting said webto. provide shingle ,20 strips of desired sizes.

7. The steps in the process of manufactur- Ving shinglesconsisting incontinuously advancing a slotted web of rooiing base While maintainingit in a horizontal plane, applying comminuted minerals to the oppositemarginal portions only of said web and in thereafter dividing said Webto provide shingle strips of desired sizes.

8. A continuous process of manufacturing 3. composition shinglesconsisting in continuously advancing a slotted web while maintaining itin a horizontal plane, applying a. coating of asphalt of a substantiallynonspreadable consistency to the opposite marginal zones only of saidweb, but leaving the central portion thereof free from such coating,reslating the marginal portions ofthe web only as the same iscontinuously advancing in a horizontal plane, subjecting the thusrecoated and reslated marginal portions of the Web to pressure to firmlyimbed the slate in the asphalt-and in finally longitudinally slittingthe web as it advances.

In testimony whereof I afix my signature.

CHESTER R. MACDONALD.

